NEW YORK (Reuters Health) - Ginseng and ginkgo biloba fans may be relieved to learn that these two popular herbal supplements don’t seem to alter how most prescription and over-the-counter drugs are absorbed or metabolized in the body, unlike other herbs such as Saint John’s Wort.The effects of prescription and over-the-counter drugs depend on the properties of the drug, how much drug enters the body, and on how long the drug stays in the body. The latter two properties are called drug “pharmacokinetics.”>>> Discuss This Story